(Reuters) - Mapping startup Mapbox Inc said on Wednesday it is teaming up with Microsoft Corp, Intel Corp and Softbank Group Corp’s ARM Holdings chip unit to deepen its push into providing maps for self-driving cars.

FILE PHOTO: Silhouettes of mobile users are seen next to a screen projection of Microsoft logo in this picture illustration taken March 28, 2018. REUTERS/Dado Ruvic/Illustration

Mapbox does not make a mapping app itself. It instead competes against Alphabet Inc’s Google Maps and HERE Technologies, the map firm owned by a group of companies, to provide the underlying maps inside of other apps. Mapbox maps are found in Snap Inc’s messaging app and the Instacart grocery delivery app.

But the Washington, D.C.-founded startup, which has raised about $228 million from Softbank’s Vision Fund, DFJ Growth and others, has been pushing into providing tools for software developers who are making the software for self-driving cars.

“Our main focus has been in making maps for humans,” Chief Executive Officer Eric Gundersen told Reuters in an interview. But maps for self-driving cars are read by the cars’ computers and need more detailed data, he said.

At an event it held for software developers in San Francisco on Wednesday, Mapbox announced a handful of partnerships designed to make its technology more useful for self-driving cars.

One of Mapbox’s products is software that lets either a mobile phone or a car’s computer see the road as the car drives, picking out things like lanes or speed-limit signs. The company said it will weave that software together with an offering from Microsoft.

The combination will let drivers in the car see real-time events like speed limit changes but then split off some of the camera data and send it to Microsoft’s cloud computer service, Azure. Once there, the data can be processed later by powerful servers to help improve the algorithms that help self-driving cars navigate.

Separately, Mapbox is also working with chipmaker ARM to optimize its self-driving vision software so features detected by ARM’s chips can be recognized as lanes, pedestrians and road signs even faster. In one form or another, ARM’s chips power the majority of mobile phones, tablets and other mobile computers that are making their way into cars.

Mapbox is also pairing with Intel’s Mobileye self-driving unit, which the chipmaker purchased last year for $15.3 billion.

Mobileye is building its own detailed database of road features that is stored in the cloud. Mapbox has built software that will live in cars to beam down Mobileye’s data without hogging up mobile data bandwidth. Cars that use the system will get a constant map ahead of about 200 meters (660 ft), providing a key backup to the car’s onboard sensors, the companies said.

(This version of the story has been refiled to add missing word “with” in headline)